5-Piece Set Professional HSS A-Type Center Drill Bits 90 Degree DRINYOUNG (Type A, 5pcs（90°）：A1 A2 A3 A4 A5)

Key features

• 5-Piece Set Thiskit comprises five A-type 90° centre drills (A1, A2, A3, A4, A5), catering to diverse requirements from fine to coarse machining.
• Distinctive Features of the 90-Degree Design 90° Tapered Bore: The machined centre hole features a 90-degree angle rather than the standard 60 degrees, resulting in a significantly steeper drill point angle.
• Precise Guidance, Prevents Walking & Skidding Its pre-formed 90° conical hole provides accurate and reliable initial guidance for subsequent drills, effectively preventing bit slippage, deviation, or "walking" at the start, ensuring hole position accuracy.
• Protects Drill Bits, Extends Tool Life By providing excellent initial centering and guidance, it significantly reduces impact and lateral stress on the drill bit during the starting phase, preventing chipping or breakage and markedly extending the service life of expensive drill bits.
• High-Speed Steel (HSS) Madefrom high-quality High-Speed Steel (HSS), it balances hardness and toughness, withstands the impact of guide drilling.

Free shipping included. 30-day hassle-free returns.